Updated glfw instructions

README.md

@@ -28,7 +28,7 @@ make
 sudo apt-get install libglfw3-dev
 ```
 
-If libglfw3-dev is not available on your system, you can install manually with:
+If libglfw3-dev is not available on your system, you can install it manually with:
 ```
 git clone https://github.com/glfw/glfw.git
 cd glfw
@@ -38,7 +38,7 @@ cmake -DBUILD_SHARED_LIBS=ON ../
 make
 sudo make install
 ```
-**Note** The `-DBUILD_SHARED_LIBS` is necessary otherwise cmake will create a static library.
+**Note:** The `-DBUILD_SHARED_LIBS` is necessary otherwise cmake will create a static library.
 
 
 ### Execution